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本程序仿真了信号与系统中的频谱混叠，频谱泄漏和栅栏现象，包含三个文件：pinpufenxi.m, pinpufenxi.fig和一份word简介文档。(the process of signal simulation system with a spectrum-aliasing, spectrum leakage and fencing, contains three documents : pinpufenxi.m, pinpufenxi.fig and a brief word document.)

现代数字信号处理经典版 现代数字信号处理经典版 现代数字信号处理经典版 (Classic modern digital signal processing)

Dijkstra最短路算法 flod算法：求任意两点之间的最短路.可以把矩阵直接带进去求解。(Dijkstra shortest path algorithm flod algorithm: seeking the shortest path between any two points. Can be brought directly into the matrix to solve.)

《射频电路设计——理论与应用》一书课后习题第八章Matlab程序代码("RF circuit design-- Theory and Application," a book chapter VIII Swimming Exercises Matlab code)

写一个MATLAB程序，实现4个时间同步的CDMA用户的仿真，其中每个用户都使用长度为L=31的不同的Gold序列。每个用户都采用它们代表的Gold序列的二进制（+-1）调制。每个用户的接收端将这个复合的CDMA接收信号相关，而这个复合的信号都在它们各自的序列上受到AWGN的污损（基于按码片相加）。在N=10000信息比特下，仿真估值并画出作为SNR的函数的CDMA通信系统的差错概率。(Write a MATLAB program, the realization of the four time synchronization of the simulation of CDMA users, including the length of each user for use of the L = 31 different Gold sequences. They are used for each user on behalf of the Gold sequence of binary (+-1) modulation. Each user' s receiver will receive the composite CDMA signal, and this composite signal in the sequence of their respective defaced by the AWGN (additive based on the chip by). Information in the N = 10000 bits, the simulation value and draw as a function of SNR of the CDMA communication system the probability of error.)

天在维普下载了一篇SPIHT算法改进的论文，（耿兴云，《基于改进SPIHT的静态图像编码》，电脑知识与技术：学术交流-2007年5期），我根据该文提出的改进算法，用Matlab来实现，却发现改进算法的程序运行速度比原算法还要慢，希望有兴趣的朋友进来看看，评论一下原因。(Days in the VIP downloaded a SPIHT algorithm to improve the paper, (Gengxing Yun, " based on improved SPIHT still image coding," Computer Knowledge and Technology: 5-year academic exchange-2 007), in accordance with this paper the improved algorithm Matlab to achieve, but found that the improved algorithm runs faster than the original algorithm is also slow, hope to have interested friends come to see, comment on why.)

改进的空间平滑music方法，用于阵列信号处理的高分辨率估计(promoted music algorithm)

MATLAB Code for Parametric Method of Spectrum estimatin. using Auto Regressive Method, Both levinson Durbin recursion and yule waker method,

三相四线制两电平三桥臂APF，中线电流由电容中点控制，abc三相坐标系下滞环控制，matlab2006b，高版本的低通滤波器需更换(The three-phase four wire three-level two leg APF, the neutral current is controlled by the capacitor, hysteresis control, ABC three-phase coordinate system matlab2006b, low-pass filter, high version of the need to change)

利用matlab蚁群算法进行人群场馆疏散模拟，找到逃生路线(Using MATLAB ant colony algorithm to simulate crowd evacuation and find escape route)